Concrete surface strain sensor with high output sensitivity and manufacturing and measuring method thereof

A concrete surface and strain sensor technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problem that the sensitivity cannot meet the needs of use, and achieve the effect of optimizing output sensitivity, ensuring stability, and large range

Active Publication Date: 2020-11-03
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing strain sensors on the market cannot be used in harsh environments, and the sensitivity cannot be adapted to the existing use requirements

Method used

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  • Concrete surface strain sensor with high output sensitivity and manufacturing and measuring method thereof
  • Concrete surface strain sensor with high output sensitivity and manufacturing and measuring method thereof
  • Concrete surface strain sensor with high output sensitivity and manufacturing and measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] see Figure 1-6 , a concrete surface strain sensor with high output sensitivity, which includes an elastic element 1, and a strain gauge circuit structure 3 for collecting and converting strain signals is arranged on the vault of the elastic element 1, and the strain gauge circuit structure 3 passes through The waterproof layer structure 2 is packaged and bonded on the top of the elastic element 1, and the two arches of the elastic element 1 are respectively provided with a fixed hinge support 4 and a movable hinge support 5.

[0046] Further, the vault strain of the elastic element 1 has nothing to do with the material, and it is made of galvanized iron sheet material. Make sure it has some flexibility.

[0047] Further, in order to make the strain response of the vault sufficiently sensitive, the elastic element 1 is optimized during the preparation process of the elastic element 1, and the sensing efficiency of the arch elastic element 1 with different sizes is solv...

Embodiment 2

[0054] The manufacturing method of the concrete surface strain sensor with high output sensitivity comprises the following steps:

[0055] Step 1: Grinding the vault of the elastic element 1 so as to level the first strain gauge 6, the second strain gauge 7, the third strain gauge 8 and the fourth strain gauge 9 to be pasted;

[0056] Step 2: Use the quick-drying adhesive base layer 14 to perform preliminary waterproof glue treatment on the bottom layer, and then use the quick-drying adhesive base layer 14 to paste the first strain gauge 6, the second strain gauge 7, the third strain gauge 8 and the fourth strain gauge 9 at the vault;

[0057] Step 3: After pasting all the strain gauges, use adhesive tape to wrap several circles of tape on the end of the strain gauge wires to prevent short circuits between the strain gauges and the elastic elements;

[0058] Step 4: Solder the wires of the strain gauge with tin and the external wires, and connect them according to the full br...

Embodiment 3

[0063] The method for measuring the concrete surface strain sensor with high output sensitivity comprises the following steps:

[0064] The average strain between the supports is represented by the strain generated by the support displacement of the concrete surface strain sensor on the vault. In the calculation equation, ε is the strain on the concrete surface, ε 读 is the reading of the sensor, S is the output sensitivity of the sensor, Δ 支座反力 is the displacement generated by the reaction force of the support at the bonding point, and L is the span of the sensor. The calculation equation is as follows:

[0065]

[0066] In order to reduce the error of the bonding point of the support, the influence of the bonding point during work is studied. A 2mm gasket is used at the support, and its area S 垫片 =3.14mm 2 , consider the displacement generated by the support reaction force to calculate, where τ 支座 is the shear stress at the support, F 支座反力 is the reaction force at the ...

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Abstract

The invention provides a concrete surface strain sensor with high-output-sensitivity and a manufacturing and measuring method thereof, the concrete surface strain sensor with high-output-sensitivitycomprises an elastic element, a strain gauge line structure used for collecting and converting strain signals is arranged at the vault part of the elastic element. The strain gauge circuit structure ispackaged and bonded at the top of the elastic element through a waterproof layer structure, and a fixed hinge support and a movable hinge support are respectively arranged at two arch foot parts of the elastic element. The vault strain of the elastic element is irrelevant to materials, and the elastic element is made of galvanized iron sheet materials. In order to enable the sensor to adapt to normal work in various severe environments, an elastic element of the sensor and a strain gauge at the arch crown are required to be protected and sealed with glue.

Description

technical field [0001] The invention relates to a concrete surface strain sensor with high output sensitivity and a manufacturing and measuring method thereof, which can be used for measuring concrete surface strain and can work in water, and belongs to the technical field of civil engineering detection devices. Background technique [0002] Strain measurement on concrete surfaces is an important part of measurement operations in engineering or testing. In engineering, various changes in the external environment make the strain sensor in a harsh environment. [0003] The strain sensors currently on the market cannot be used in harsh environments, and the sensitivity cannot be adapted to the existing use requirements. Therefore, it is necessary to design a concrete surface strain sensor with high output sensitivity. Contents of the invention [0004] In order to deal with this situation, the present invention studies and designs a concrete surface strain sensor with high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
CPCG01B7/18
Inventor 徐港陈少坤彭艳周王鑫科徐伟杰武文林
Owner CHINA THREE GORGES UNIV
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